[MEI-L] Tools/libraries to find staves in scanned sheet music

[Max Poliakovski]

Audiveris implements a robust stave finding algorithm that has been
intensively tested on a huge set of articifial and real-world scores.

Audiveris' GRID step outputs very precise information about each stave
including each and every staff line as a set of line segments. You can do
with that whatever you want (redrawing, analyzing, reprint etc.)

Audiveris is also cross-platform, fully open and extensible.

Best
Max

Thomas Weber <thomas.weber at notengrafik.com> schrieb am Do., 30. Apr. 2020
11:18:

> SharpEye has a text output format which gives the staff positions quite
> precisely – at least if there is no rotation of the page involved (which is
> a requirement for your use case anyway).  But the output format is not very
> well documented.
>
>
> Am 30.04.20 um 10:45 schrieb Urs Liska:
> > Hi Johannes
> >
> > Am Donnerstag, den 30.04.2020, 09:57 +0200 schrieb Johannes Kepper:
> >> Hi Urs,
> >>
> >> you could use the Measure Detector (
> >> https://measure-detector.edirom.de/),
> > Thank you for this link.
> >
> >> which automatically generates an MEI file with measure positions. You
> >> may preview those boxes by clicking on a file name after the file has
> >> been recognized.
> > This is obviously a great tool that will help me to (maybe finally)
> > implement a long-standing wish of mine for pimping up the Frescobaldi
> > manuscript viewer (
> >
> https://github.com/frescobaldi/frescobaldi/issues/923#issuecomment-621697927
> > ).
> >
> >> However, it doesn't tell you how many staves will need to go in
> >> there, so this approach needs some more steps in a toolchain before
> >> you get your results,
> > I have the impression that the tool is focused on something else, and I
> > don't know whether  it is worth exploring it in the direction I need
> > (especially because I'm sure there are other existing tools that *do*
> > look for the same thing I do).
> >
> > What I need is the exact position of all the stafflines to overlay
> > generated stafflines. Eventually you should be able to switch/blend
> > between empty staves, original score and hopefully a score completed by
> > the teacher/students.
> >
> >
> >> but they will depend on your preferred tools and so on. I'm sure
> >> other approaches are equally possible…
> > The preferred tools are not the most important part. Having an MEI file
> > like the one from the measure-detector would surely be a good starting
> > point for arbitrary tools.
> >
> > Best
> > Urs
> >
> >> All best,
> >> jo
> >>
> >>> Am 30.04.2020 um 09:41 schrieb Urs Liska <ul at openlilylib.org>:
> >>>
> >>> Dear MEI,
> >>>
> >>> I am investigating ways to produce empty staves/barlines to overlay
> >>> over scanned sheet music. The use case is creating teaching/testing
> >>> sheets for music theory and aural training classes (so the target
> >>> repertoire would be mostly common western notation).
> >>>
> >>> My first approach was to create a Scribus script that draws staff-
> >>> and
> >>> barlines from rectangles that have been drawn over the systems.
> >>> While
> >>> this works surprisingly well it is still a tedious work for longer
> >>> and
> >>> full scores.
> >>>
> >>> AFAIK the detection of staff- and barlines is basically a solved
> >>> challenge in OMR. Could somebody point me towards the potentially
> >>> easiest approach I should explore? Algorithms, libraries, ready-to-
> >>> use
> >>> tools?
> >>>
> >>> What I need is something that analyses (multipage) sheet music from
> >>> image or PDF files and produces a structured text file with all the
> >>> relevant coordinates, or anything from which I can instruct some
> >>> tool
> >>> (whether Inkscape, Scribus, LilyPond or whatever) to generate the
> >>> empty
> >>> sheet music to overlay over the scanned score.
> >>>
> >>> Thank you for any pointers
> >>> Urs
> >>>
> >>> PS: Do you agree with me that trying to somehow *remove* the
> >>> musical
> >>> content from a scanned image is a much less promising approach?
> >>>
> >>>
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